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Recent studies show that compressed sensing (CS) can recover sparse signal with much fewer measurements than traditional Nyquist theorem. From another point of view, it provides a new idea for super-resolution imaging, like the emergence of single pixel camera. However, traditional methods implemented measurement matrix by digital mirror device (DMD) or spatial light modulator, which is a serial imaging...
In this paper, we present a super resolution imaging method based on a dynamic single pixel camera. First, the proposed method obtains subhigh-resolution (HR) images with subpixel shifts by the dynamic single pixel camera. To achieve this purpose, the patterns on the digital micromirror device are subpixel shifted instead of mechanical scanning. Then, the final HR image can be reconstructed by sub-HR...
This paper describes a method that detects two co-planar circular shaped objects having the same radius from an image with clutter background. We propose an unique RANSAC based method for detecting the candidates of ellipses that divides the circular region centered at the assumed ellipse center into N equal sectors, then fits the edge points selected randomly from each sector. We propose three geometrical...
In this paper, we propose a novel feature descriptor for person re-identification without personal information. It is called Water-Drop Render Box (WDRB). The WDRB method is calculated by three steps with target color and its histogram: registration of target color, transformation of distance map, and enhancement of color using target histogram. In order to calculate WDRB, person's top-view images...
A scene-based nonuniformity correction method for infrared focal plane arrays based on multiframe registration has been undertaken in this paper. It is based on the estimation of global translation between several adjacent frames, and the resulting mean square error function is optimized using a least mean square (LMS) algorithm. The proposed method make use of the relation of adjacent frames sufficiently,...
The electron multiplying CCD (EMCCD) use impact ionization to provide high gain in the charge domain. This enables performance with an equivalent input noise of much less than 1 rms electron at pixel rates. Based on the discussion of image noise sources and their statistic characteristics of the EMCCD, the noise distribution model is established. The method of moment estimation is applied to complete...
Three-step phase-shifting is an extensively employed method for 3D shape measurement, especially for high speed 3-D image acquisition. However, since only three fringe images are used, the measurement result is susceptible to sensor and environment noise. In this paper, we propose a third harmonic injection technique for three-step phase shifting profilometry to reduce the error caused by the uncertainty...
This paper presents a novel camera calibration method for a system consists of a sensor-less mobile robot and an external camera. This method can estimate the focal length and the viewing direction of the camera relative to a plane where the sensor-less mobile robot moves from a single image of an arbitrary circle on that plane. Since it is easy to let a four-wheel mobile car to move along a circular...
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